Nonlocal theory, in its earliest formulation [1]}, [2]} is based on the idea that the stress at a point of a continuum depends not only on elastic strain at that point but involves local responses of the whole structure.
Long-range interactions are thus described by a strain-driven convolution integral supplemented with an averaging kernel characterized by a nonlocal length-scale parameter.
Such an approach was consistently applied by Eringen [3]}, [4]} to nonlocal problems involving screw dislocation and wave propagation, that are formulated in unbounded domains.
However, mathematical difficulties are apparent when the strain-driven strategy is applied to structural problems which are generally defined in bounded domains.
